[Zope] Simplified question repeat..Date - to - String

I need to use year() as a string value in a <dtml-with yearVar> type of thing. The folder's id is 2001 I need to use dtml-with to get to that folder. If I use the folder name of 2001 it works fine. If I use the variable name in the dtml-with, it does not work. Looking into ZCatalogs for the future but need a quick fix for this now. Any suggestions? Thanks...this date stuff is real pain.